Any of a set of two or more numbers used to determine the position of a point, line, curve, or plane in a space of a given dimension with respect to a system of lines or other fixed references.

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2answers
82 views

Saving a gml layer does not change coordinates

I am trying to export a gml layer to geojson with lat/lng as the preferred coordinate system. So what I did was a 'save as' on the layer with selected CRS: 'IGNF: WGS84G'. Now I was hoping it ...
2
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1answer
78 views

Determine when I have crossed state line?

We are currently using the Google Maps API to get route information and total mileage but we would like to determine when we are crossing into a new state. When we return the route information we can ...
2
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1answer
402 views

Getting polygon shapefile node coordinates and point order

I am trying to get the coordinates of each node of a polygon in QGIS. What I basically did is use the following tools: Vector -> Geometry tools -> Extract nodes Vector -> Geometry tools -> Export ...
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1answer
339 views

Leaflet: Container coordinates vs Layer coordinates?

What is the difference between map container coordinates and layer coordinates? From what I gathered, the map container coordinates are always relative to the map viewport, and while layer ...
1
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1answer
114 views

Linear unit of a Coordinate system

My dataframe coordinate system is in UTM with linear unit Meter. If I have a Polygon shapefile in a UTM coordinate system with a linear unit of Foot_US and I am sent a shapefile in the same UTM ...
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1answer
313 views

What datum (reference ellipsoid) does Nasa Worldwind use?

What datum (reference ellipsoid) does Nasa Worldwind use? I can't seem to find where Nasa Worldwind tells explicitly what datum they use. I need some sort of valid link.
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1answer
35 views

converting coordinates from unusual DMS format to decimal

So I've been shared a dataset with what to me is an unusual format for degree min second data. In their own words: The coordinates provided are longitude and latitude in degrees minutes and ...
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1answer
75 views

How to plot lat/long stored as text in Oracle DB using report builder/SSRS r2

We use an Oracle 10g database. However we write reports using SSRS or report builder, using the Oracle connection type to the datbase. In oracle we have 2 text fields, one for lat and one for long. ...
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1answer
65 views

Does a PDF contains geographical coordinate if the Adobe Reader Geospatial Location Tool doesn't write anything?

Does a PDF contain geographical coordinate if the Adobe Reader Geospatial Location Tool doesn't write anything? I mean that I am moving the mouse over the pdf and no latitude and longitude values ...
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1answer
263 views

Coordinate conversion - Lat Long to State Plane, ArcServer-Silverlight

I am trying to convert from a Lat/Long value I get from a table to a x/y value that I can use to plot a graphic. I have seen one way to do this may be to use something like this: feature.Geometry = ...
3
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0answers
85 views

Unknown gridlines on old Greenland base map!

Can anyone help me out please? I'm using an old 1:10,000 base map of Greenland for a mapping project with nice 10cm gridlines already drawn on. However it uses a coordinate system which is unfamiliar ...
3
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0answers
210 views

How to Batch Change X, Y Coordinate Number in ArcGIS?

I have a huge number of points (100000 points). Some of these have the same x,y coordinates. For example, 50 points are same in x,y then 100 points are same in another x,y coordinates and so on. ...
2
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0answers
25 views

Is it safe to store coordinates on NFC tags always in one CRS and rely on conversion for others

I'm involved in NFC (Near Field Communication) standardization of a record structure for geographic point locations. That will allow to put coordinates on NFC memory tags which can be read with a ...
2
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0answers
130 views

How to add XY coordinates (latitude/longitude) to a DEM raster in ArcGIS 10.1

I would like to add xy coordinates of about 10 sites to a raster. I am using ArcGIS 10.1 and my xy coordinates are on Access 2013 database - saved as .mdb. The steps I have taken so far: 1) In ...
2
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0answers
67 views

How to locate a house on the 3D Map correctly?

I've done my 3D map generation in WebGL/THREE.JS project and have an issue with the building locations. I have the data about building position ( its polygon ) from DB server, but first of all I want ...
2
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0answers
90 views

Height of the geoid in ECEF coordinates

I know that the relationship of geoid height N and ellipsoid height h to orthometric height H is defined by H = h - N, but what if I have some position in Earth-Centered-Earth-Fixed (ECEF) ...
2
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0answers
132 views

PyProj/Proj4 convert geographic to projected coordinates for Geostationary Data

I am trying to convert geographic coordinates (in degrees east/north lon lat) to projected coordinates in meters for geostationary full disc data (GVAR Goes East data from CLASS). To do this, I tried ...
2
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0answers
186 views

How to limit a specific area in order to have a topographic 3D map using MatLab?

I am using MatLab, I want to build a topographic 3D map, I am following this guide, I have been doing the steps listed on the section Draping Geoid Heights over Topography, and I do not have any ...
2
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0answers
152 views

Plotting X, Y coordinates generated from MySQL database in QGIS

Currently running QGIS 1.8.0 on Mac OS X 10.8.4. I can plot points on a map using the "Add delimited text layer" plugin to get x-y coordinates from a text file. However, I'd like to be able to ...
2
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0answers
81 views

Should 2D Positions and 3D Positions be considered conceptually different entities?

Let's suppose we want to model GeographicPositions, described by coordinates or coordinate tuples inside some Coordinate Reference System. Also, these would be put inside some sequence to represent ...
2
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0answers
114 views

Comparing two spatial datasets statistically

I'm new to this forum. I'm working on the following problem - I have two datasets. Let's call it dataset A and B. Both of them will contain a set of points like A1,LonA1,LatA1 A2,LonA2,LatA2 .. .. ...
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0answers
99 views

Interpolate current Course value of GPS using previous Course values

I have a set of GPS data with Lat, lon and Course. I need to interpolate current value of course, using previous values of Course. The formula I am using is not accurate in curves.In C language I was ...
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0answers
50 views

LLA vs ECEF--which to choose?

I will be providing points in 3D to an external source via XML. One coworker suggests Lat/Long/Alt and another suggests ECEF. We can do either without much trouble. We have an existing product that ...
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0answers
83 views

Converting custom grid to OS grid

I have two sets of data, one is in OS coords, no problem there, but the other was set out in about 50 off 10x10 metre grids aligned to a 'feature' on the ground. I do have the OS coordinates of their ...
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0answers
38 views

Extrapolate data and district names from map

My data: soil samples in each district. My question: I want to extrapolate from the soil sample's map the names of the districts in which the samples have been collected. I have already found the ...
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0answers
122 views

How to define coordinate system and geographic transformation for a CAD drawing?

I am a GIS guy and I occasionally work with CAD files as well. Now I need to know how I can define a coordinate system and a geographic transformation for a CAD Drawing. According to ESRI: "You can ...
1
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0answers
873 views

convert GPS to XY coordinates

if i have obtain GPS coordinates as Latitude/Longitude, then i need to convert them to XY coordinates, i see this link actually i need to get the Trilateration , in its equation i need the XY ...
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0answers
121 views

Google earth incorrectly rendering coordinates?

My circles are rendering funky on the poles, and along the equator. Here are my coordinates: 158.05553767833,-78.151355482613 152.68654993135,-76.924955252783 147.72303124605,-75.713526831152 ...
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0answers
112 views

Is there a ModestMaps or other flex library for finding the distance between 2 lat/lon coordinates?

I'm using ModestMaps in my Adobe Flex application. Is there a flex library method to calculate the distance between two of my lat/lon coordinates, or am I stuck coding the Haversine by hand? I've ...
1
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0answers
149 views

gdallocationinfo from C++?

I need a C++ API to convert x,y Image Coordinates in their native projection to output image pixel,line coordnates. I see the gdallocationinfo documentation, but no API for it. Where in online GDAL ...
0
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0answers
20 views

Transform map coordinates to page coordinate in ArcObjects

I have a map inside a page layout in ArcMap. Currently, I use this code to convert geographic coordinates to page coordinates: IMap map = ... IPageLayout pageLayout = ... IDisplayTransformation ...
0
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0answers
42 views

New Feature is not Displaying

I have a feature layer on my ArcGIS for Server. I am trying to add a point based on coordinates. With the code below, I do not get any errors, but the graphic nor feature is created or put into the ...
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0answers
20 views

Issue on Setting Coordinates for SVG Map

Can you please help me to figure out how to set coordinates for BC Canada , based on following snippet. This code is setting coordinates for French as the 43.15710, 8.17199 is the lower right point ...
0
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0answers
35 views

Define Projection for an autocad transferred data

If I had a cadastral map on an Autocad file and i convert it to a dxf extension in order to open it in QGIS. I Added The Parcels borders and text in QGIS. Can you please list the steps which I should ...
0
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0answers
20 views

QGIS export DTM with x.000 coordinates

I'm new at QGIS and would like to solve the following problem: I import points and breaklines and interpolate this data. Afterwards the generated DTM is exported to a new file (this works). Now I ...
0
votes
0answers
27 views

recalculate latitude and longitude from a pixel in a cropped map

i want to recalculate a geographic coordinate from a pixel in a map. For this i have the size and the coordinates from the map to convert a coordinate to a pixel is use the algorithm, you find at ...
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0answers
19 views

Hotlinking Images using PickListener(MOJO)

I have a class class MyPickAdapter implements PickListener { public void beginPick(PickEvent pe) {} public void endPick(PickEvent pe) {} public void foundData(PickEvent pe) { } }; ...
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0answers
49 views

Coordinate points don't show on correct location in the open layers plugin Qgis

I know there are several questions concerning the open layers plugin and CRS's. I tried several things, but none of it solved my problem so far. For a rural area in Nepal a little healthcentre wants ...
0
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0answers
42 views

Error north coordinate not allowed using r.water.outlet in GRASS

When I am trying to delineate a basin from this code: r.water.outlet drainage=drainage1 basin=basin1 \ east=518675.070417019 north=911542.292643082 Coordinate system: UTM-cartesian xy (used by ...
0
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0answers
148 views

Get Pixel index of a clicked point from a tile in WMTS layer

How do I get the index of a clicked point from a tile in WMTS layer? I also want the tile row and column number corresponding to the clicked location. So I tried to set the extent of my WMTS layer to ...
0
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0answers
86 views

OpenLayers maxExtent

I've displaying Ordnance Survey UK tiles in OpenLayers using a TMS Layer the scales are using are 1000K, 250K, 50K and 10K. I've set the maxExtent to 0.0, 0.0, 700000.0, 1300000.0 which is working ...
0
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0answers
524 views

Unable to dynamically locate map boundary coordinates in OSM/Leaflet

I have been trying for the past hour to take the coordinates of the map edge in a OSM/leaflet application I am making. While I can get the coordinates of the center, and I can get the coordinates of ...
0
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0answers
140 views

Python script to create a point WITH attributes values

GIS platform: ArcGIS 10.1 I have coded up a Python script that determines the coordinates of where I need to create a new (calibration)point, but I can't work out how to add it to a feature class ...
0
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0answers
146 views

How to get x and y coordinate values of an annotational featureclass

I am able to get the x and y coordinate values from point, polyline, polygon and multipoint type featureclasses. However, I am unable to export x and y coordinate values of an annotational ...
0
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0answers
134 views

MapFish Print latitude, longitude innacuracy?

I'm new to GIS so this may be trivial: I'm using MapFish Print to create some PNG. I have issues to place the viewport. When I use a random GPS coordinate: -20.904522,55.475106 which seem to point ...